The 17-year-old actress was joined at the party by Sofia Richie, who looked fabulous as Khaleesi from Game of Thrones, and Cameron Monaghan, who channeled Patrick Bateman from American Psycho – complete with a bloodied knife!

Also in attendance at the big bash were Young & Hungry‘s Emily Osment (dressed as Cruella Devil) and her date for the evening, Mallory Jansen (as Audrey Hepburn), and actress Francia Raisa (dressed as Rosie of Sophia Grace & Rosie from The Ellen Show). Just Jared‘s Jared Eng also got in on the fun with the guests – he dressed as a shirtless ringmaster.

While at the event, Bella stopped by the What Brand Is It? booth for a chance to win $25,000! Even better – now you can have a shot at winning big bucks! Get all the details here.

45+ pictures inside of Bella Thorne and others at the Just Jared Halloween Party…